Some computers require RAM chips to be installed in sets. This is typically because the computer designers are speeding up the memory bandwidth by dividing the data across more than one chip; i.e. You can get twice the bandwidth if half the data is on one chip and half on the other.

Small Dog Review by: dboyd2 on January 7th, 2010

I bought two of these modules to upgrade my MacBook Pro from 2GB of RAM to 4GB. A great price for
RAM with a no-hassle 10 year warranty. It was pretty easy to replace the modules my machine came with
10 screws out and in and the modules were recognized! I'm a multitasker and like to have enough RAM for the average 10 or so applications I run simultaneously. As I write this review, I have about 850MB free.

Small Dog Review by: bjjeralds on February 9th, 2011

This was such a great choice for me. My computer responds a lot faster now. I wonder why I didn't make
this upgrade earlier.

Small Dog Review by: mcoleman4 on January 8th, 2010

I Just bought this 2chips of this ram to upgrade my 13 inch Aluminum MacBook to 4GB of Ram (it's
max). It made a huge difference in the performance of my machine. I tend to leave many applications
open and usually between 10-20 tabs open in Safari. I defiantly use my computers memory intensely,
but I'm happy to report that I almost never see the scrolling beach ball now!!! Definitely an inexpensive
way to give your computer a boost.

Small Dog Review by: cmassey on January 7th, 2010

If you're a multitasker/gamer/parallels user like myself it's a no brainer to upgrade your macbook or macbook pro to 4GB. I bought two of these chips and they were super easy to install and recognized the first time. Good quality stuff.